Contra Costa County property record for 20 Promontory Pl, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,016 sqft · built 2012 |
| Lot Size | 1.77 acres (77,536 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $1,250,000 (Sep 2020) |
| Tax Bill | $20,344 (2025) |
| Deeds & Mortgages | Dec 2017 Mortgage Sep 2020 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-640-022-8 |
| Primary APN | 119-640-022-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 3,016 sqft Living Area |
| 1st Floor Area | 3,016 sqft |
| Year Built | Built 2012 |
|---|---|
| Effective Year Built | Effective 2013 |
| Lot Area | 77,536 sqft |
| Garage Type | Attached |
| Garage Area | 691 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 20 PROMONTORY PL |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1757 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8719 L15 & POR TR ADJ |
| Legal Subdivision | SUBDIVISION 8719 |
| Legal Tract | 8719 |
| Legal Lot Number | 15 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 355306 |
20 Promontory Pl is owner-occupied and held in a trust since September 2020.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 20 PROMONTORY PL, CLAYTON, CA 94517-1757 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Dec 11, 2017 | Deed of Trust, Mortgage · ARM US BANK NA |
| Sep 1, 2020 | Grant Deed, Transfer FIRST AMERICAN TITLE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 1, 2020 · Amount on File |
| Deed Sale | Sep 1, 2020 · Amount on File |
| Prior Sale | Feb 20, 2013 · Amount on File |
| Deed Document Number | 2020190180 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 20 PROMONTORY PL, CLAYTON, CA 94517-1757 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000231719 |
|---|---|
| Date | Dec 11, 2017 |
| Instrument | 2017-231719 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Address | OWENSBORO, KY 42301 |
| Type | ARM |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Dec 1, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.75% |
| Adjustable | Adjustable Rate Rider |
| Type Change Date | Dec 1, 2027 |
| Change Frequency | Annually |
| Min Rate At Change | 2.75% |
| Max Rate At Change | 8.75% |
| Index | 1-Year CMT |
| Max Rate | 8.75% |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 1, 2020 |
| Property Address | 20 PROMONTORY PL, CLAYTON, CA 94517-1757 |
| Document Number | 0000190180 |
| Instrument Date | Aug 27, 2020 |
| Instrument | 190180 |
| Transaction Type | Transfer |
| Record Updated | Sep 16, 2020 |
| Title Company | FIRST AMERICAN TITLE |
| Amount | Amount on Record |
|---|---|
| Tax | $1,375.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 20 PROMONTORY PL CLAYTON CA 945171757, CLAYTON, CA 94517-1757 |
The 2025 property tax bill for 20 Promontory Pl was $20,344 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Clayton City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,380,099 (+2%) Land $645,886 Building $734,213 | |
| 2025 | $20,344.00 Homeowner's exemption | $1,353,039 Land $633,222 Building $719,817 |
| 2023 | $19,452.00 (+0.92%) Homeowner's exemption | $1,300,500 Land $608,634 Building $691,866 |
| 2022 | $19,274.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 20 Promontory Pl in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1982.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (1982) |
| Most Recent Claim | Dec 1982 · tidal / storm surge |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 20 Promontory Pl is high, ranking above 84% of the US, with a 0.8% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 84% of the US · above 63% of California |
|---|---|
| Wildfire Likelihood | 0.8% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 274 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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